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频率是电力系统的关键指标,电网动态过程中系统各处的频率响应存在时空分布特性.输电网架结构和机组的不均匀分布及其参数的差异是影响频率时空分布的重要因素.过电网扰动初期的频率传播模型分析了输电网络结构和机组惯性对电网频率时空分布的影响机理,以实际大规模电网为例,对不同地理位置以及不同电压等级输电线路的投切对频率时空分布的影响进行了分析,并研究了机组惯性参数改变和机组位置对系统频率时空分布的影响.“,”Frequency is an important index of the power system. Space-time distribution characteristic of frequency response exists during the dynamic process of power systems. The uneven distribution and difference in parameters of transmission line topology and generators are major factors affecting the space-time distribution of frequency responses. The influence of transmission lines and unit inertia on the space-time distribution of power system frequency is theoretically analyzed with frequency propagation model in the early stage of disturbances. The influence of geographical location and voltage level of transmission lines are examined with numerical simulations of real large scale power system model. The impact of generator inertia on space-time distribution of power system frequency is also studied.